A signal filter and an efficient procedure are presented, which enable the online filtering of interferences with known frequencies with a minor or rather no phase loss and accordingly without signal delay.
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We present a new technology which leads to the development of surface micro structures and a black appearance of Ti containing, commercially available glasses by irradiation with an excimer laser (ArF laser with 193 nm wavelength and 20 ns pulse duration). The technology can be accomplished in a standard air environment and does not require vacuum or inert gas.
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A novel hub for a free from play transmission of relatively high torsional moments between a shaft and a hub is presented. Moreover, versatile applicable hubs are suggested, by considering manufacturing and supply effort and component variety.
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A novel technology for the mechanical stop of one or multiple rotating propellers is suggested. The emergency propeller stop is achieved by combining a material-mediated engagement mechanism with temporal coordination of rotor contact.
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Ein hocheffizientes Verfahren zur Entfernung von Restsauerstoff aus Edelgasen wird vorgeschlagen, das den Einsatz hochreaktiver Substanzen umgeht und die Verunreinigung von Edelgasen vermeidet.
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A highly efficient process for the removal of residual oxygen from nobel gases is suggested, which bypasses the use of highly reactive substances and avoids contamination of nobel gases.
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This compact and cost-effective technology facilitates a real-time, simultaneous measurement of plasma voltage and plasma current with a combined device in the high-voltage circuit of a cold atmospheric plasma. The system exhibits a good time resolution and enables a live plasma self-regulation.
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The invention describes a novel high-voltage direct-current (HVDC) transmission clutch unit and a method for coupling at least two AC voltage power supply networks with each other.
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A manufacturing process for steel components with a predominantly bainitic structure is proposed, which avoids the conventionally required long production times and enables large-scale production.
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The invention describes multifunctional, self-locking connection hook elements, which combine features of a rigging plate and a hook in one component. The components can be produced cost-effectively from plastics and metals.
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A novel production method for a biobased adhesive, which comprises a tailored lignin structure as main component, is presented. The process technology overcomes the use of toxic phenol and formaldehyde, while the resulting adhesive exhibits good physicochemical and mechanical properties.
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This novel device enables the cleaning of water in a pipe system into which an irradiation unit is inserted via an insertion module with flange connection. The surrounding water is then irradiated across the entire cross-section with a blue laser as it passes through the quartz tube, killing any microorganisms it contains.
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A welding head for laser-assisted or laser-based buildup welding with a coaxial arrangement of the weld deposit feed is presented. Several individual beams are bundled in a focal point below the welding material supply. In general, all meltable materials (e.g. metals, glass or polymers) can be processed with this system.
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A stretched flexible hollow fiber is proposed as a waveguide in high-energy pulse compressors. This approach leads to superior straightness virtually independent of the fiber length. It is particularly well suited for fibers with inner diameters much larger than the wavelength, where the main limitation for the fiber length is losses due to undesired fiber bending.
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Nonlinear crystals are used for frequency conversion of lasers. With the help of this technology the radiation hardness in the UV range could be increased and at the same time the laser construction could be simplified, because the crystals do not have to be heated permanently. In particular, the present patent concerns the nonlinear family of hygroscopic borates (LBO, BBO, CLBO), which are particularly suitable for the generation of photons in the ultraviolet (UV) spectral range.
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A method has been found for freeform shaping of optical surfaces via a stress-induced viscous deformation of glass plates. Fused silica substrates can be deformed by covering them with substoichiometric silicon oxide followed by a laser patterning process and an annealing step.
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The newly developed method allows for shifting of the interference plane in the Z-direction during diffractive marking of surfaces with a grating interferometer. Plane-parallel plates are used, the rotation of which introduces a beam offset that causes a Z-shift of the interference plane when the beams are combined.
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The newly developed method only requires the detection of movement directions of light patterns (speckles) for the determination of refractive error of the human eye. The subjective evaluation of the effect of the corrective lenses by the patient can thus be reduced to a simple question (e.g. right/left).
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A special interference process allows the fabrication of computer-generated holography (CGH) as carrier of information which can’t be recognized with the human eye. The CGHs consist of N * M pixels which, when illuminated with coherent light, generate an imagine with the same pixel dimensions in a Fourier plane. Several CGHs can be written on the same area. When illuminated with the same coherent reading beam, they appear separately in different directions (diffraction orders).
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This innovative approach combines the two known methods of Laser Induced Backside Wet Etching (LIBWE) and Stimulated Emission Depletion (STED) to realize laser based material modifications below the diffraction limit. This is especially useful for precision laser modifications of transparent materials.
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